<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>验证用户名和密码</title>

    <script>
        var user = window.prompt("请输入用户名")
        var password = window.prompt("请输入密码")

        if (user == "admin" && password == "123456") {
            alert("登录成功")
        } else {
            alert("用户名或密码错误")
        }
    </script>
</head>

<body>

</body>

</html>